ref: c7b8a9f86b3e6aecc69448a6aa724938a57c9de2
dir: /lib/c/string/strcat.c/
#include <string.h> #undef strcat char * strcat(char * restrict dst, const char * restrict src) { char *ret = dst; while (*dst) ++dst; while (*dst++ = *src++) ; return ret; }